Adjustable lug strap



Feb. 17, 1948. w. BULLARD ADJUSTABLE LUG STRAP Filed Nov. 7, 1946Patented Feb. 17, 1948 Mama? .AQJUSMB l-1G WA w. Irving Billiard,Charlotte, :H- Jac b Mtg. 09-

as i or o Banshee,

s gene alist of Kimmie? Application :November 7, 194d, Serial No.708,283

My present invention is a novel and improved --lug strap particularlyemploying a plug adjust arrangement for adjustment for lengthoftheentire lug strap at the plug or heel .end.

Heretofore, in theuse .of lug straps for trans.- mitting power toapickerstick in standard types of looms, it'has been customary to formthe lug strap construction of generally U-shapedcontour and, preferably,with .aplug or block permanently fitted at the heel .or bottom .of the Uformation, .the extending arms being provided near their open ends withslots .to, allowfor adjustment -of length desired when attaching.theelug. strap .onto the actuating link 'oroperative part of the loomwhich gave the lug strap its impetus to throw the picker stick across"the loo'rn'during the weaving operation.

Such prior constructionswere objectionable in various features. Theprovision e; the slots for adjustment of length at the'open end of thearms caused considerable difiicultyin effecting the ad :iustm nt adesired 29 .1 t toi as t es slo were wii i nilie rea 9 nd fl t-1 acc sthat 9 .difii i also. c nr arla i I ue sw rk; t decreasin arse-e t... aspi tween the power linkoperating the lug strap and the face of the plugor block against which the picker stick would strike. i

' A further prior .difiiculty was that occasioned by the customaryriveting of the plug at the heel of the U-shaped arms, the plug of suchprior constructions being rigidly attached, and, when worn down to thefirst rivet rendered the entire lug strap useless.

In my present improved and adjustable lug strap I provide a moreconvenient and quickly accessible construction for the lengthwiseadjustment, said adjustment means being at the plug end or heel of thelugstrap which ordinarily extends free of the rest of the machine andout into the passageway or alley where a bank of looms are installed.Furthermore, my present invention provides quickly adjustable means tocompensate for wear on the face of the plug as well as stretch or wearon the extending arms where the bolt is attached to the power link.

A still further feature and advantage of the present constructionconsists in a. longer and larger mass of the plug material allowing forwear of the striking face of the plug on the lug strap.

By my present construction I utilize a single square .or hexagonal boltextending thru a lug "strap .tohold the same' rigid and in properrelation to the side arms interlocking the plug and side arms into firmpositionat anylengthwise ad dusted position of the plugand arms. Arurtherlnovel feature of mypresent adjust- -.able.lug strap is that Imay streamline, taper, or otherwise form the side arms so as to impartapredetermined whipj spring, and drive to the Eth c shuttle.

' Heretoiore-it has been considered essential to rely on the resilienceor elasticity of the .picker stick to predetermine whip and spring inits lugstrap and, hence, through thepicker stick to operation on theshuttle of a loom, but by my present invention Imay utilize the arms ofthe lug strap-itself .eitheralone or in cooperation with the form,structure, and resiliency of the picker stick to efiectively provideand, preferably, predetermine the desiredw-hipjsprin'g, and resiliencyof the sliuttleethrowing operation.

-I'may fo-rm-ni'ylug strap arms and plug of any suitable material. Thusthe arms maybe of wood, synthetic plastic, canvas, leather,.rubbenlmetal, bra combination otthe same, and such material Lmay-Beformed .eitheras a substantial solid mass,

.or laminated where wood :is employed, or inter,- rolled where canvas isused. The plug may be also .of any suitable material as a block of wood,leather, rubber, plastic which may be enclosed lid-rubber .orcanvas-if'desired, or .may be of laminated layers or wood; leather,rubber, .or synthetic plasticlmaterial. T i

Referring to the drawings:

Fig. 1 is a plan view partly in cross-section illustrating my novel andimproved adjustable plug lug strap;

Fig. 2 is a side view;

Fig. 3 is a side view partly in cross-section illustrating streamlinedand tapered arms of interrolled canvas;

Fig. 4 is a cross-sectional view on the line 4-4 of Fig. 1, and

Fig. 5 is a view on the line 5-5 of Fig. 1 with the adjacent armremoved.

Fig. 6 is a perspective view of a modified form of washer.

Referring to the drawings, a pair of side arms I and 2, herein shown ofwood or synthetic plastic material, are provided with an intermediateplug 3 formed of laminated wear-resisting material, preferably woodenlayers impregnated with synthetic plastic to strengthen, preserve, andunite the same as well as giving'them a wear-resisting surfaceparticularly on the inner edge 5 of the aesascs 3 plug, which is hereinillustrated as slightly convex, as is usual. The arms I and 2 areprovided with bolt-receiving holes 6 and I at the open ends of the arms;and at the opposite ends lengthwise slots 8 and 8 are formed centrallyin the arms I and 2, respectively, to allow for lengthwise adjustment ofthe plug 3. The plug 3 is fitted with a square, hexagonal, or'oval boltI thru a correspondingly formed bolt sldewise of the plug 3 and it isthus adapted to hold the plug 3 firmly, and rigidly in position when theends of the bolt" I0, which are rounded'and threaded for the pur-' V Vto the squared bolt I0 and lock nuts l2.

pose as indicated at H, are each fitte'd with nuts I2 bearing against awasher I4 which spans the openings 8 and 9, and thus constitute means tointerlock the plug 3 and arms I and 2 when the" To efiect lengthwise,

nuts l2--I2 are tightened. adjustment relatively between the plug 3 andarms I and 2, the nuts I2--I2 are loosened and the plug shifted, theshank of each end of the bolt II] traversing the slots 8 and 9respectively.

In order to more fully interlock the plug 3 and arms I and 2, I Providea pronged washer I 5 having a square opening in the center, as bestshown at I6, Fig. 5, so that the same is rigid on the bolt Ill and,hence, firmly fixed on the plug 5, this washer having a plurality ofprongs extending therefrom and adapted to impinge .into or to be buriedslightly in the adjacent side face of the arm I or 2, respectively,asshown.

This construction adds further to maintain the plug and arms in properposition in addition to the squared shank of the bolt W, as willbe'readily appreciated. c 1

In Fig. 3, I have illustrated a tapered and streamlined form of arms 2!and 22 formed of interrolled canvas with the single slots 23 and 24 atone end to receivea bolt which acts as a pivot between the lug and powerlink connecting'the same and with lengthwise adjusting slots 25 and 26,respectively, at the opposite end to receive the squared or non-rotatingbolt in with its fastening means. V

In this form I have also illustrated a tapered and streamlined formwhich may be effective to predetermine'the whip and spring in the lugstrap itself, although the material of the lug strap, being properly andscientifically constructed to provide whip and spring in the action ofthe lug strap on the picker stick, can be secured in any desired way by;the strength and resiliency of the material employed.

As shown in Fig. 6, I have illustrated a modified form of locking andpronged washer 30 to aid in interlocking the plug 5 to the arms I and 2or 2I and 22. For this purpose, the washer 30 has a squared opening inthe center 3|, a plurality of prongs 32 similar to the construction ofthe washer I5 already described but with the body or plate portion ofthe washer an extended sufficiently to have edge flanges 33 turned uptherefrom in position to fit over and engage the outside edges of thearms at each side. Thus, these flanges 33 still further aid in holdingthe -arms and plug rigidly in alignment in addition 'I claim: r A lugstrap of the kind described, having a pair of longitudinally extendingarms of canvas,

- wood, plastic, or the like non-metallic material,

and a plug formed of a plurality of layers of yieldable material withcentrally arranged recesses thru each layer in alignment and noncircularin cross-section, both said arms and plug being separable from eachother, means to assemble said arms and plug in operative position toconstitute a lug strap in a loom, in combination with fastening means tohold said plug and non-metallic arms in alignment when assembled as alug strap, said fastening means comprising a non-rotatableboltregistering with the nonrotatable openings thru said plug layers, and apair of washers fitted to the'bolt in non-rotatable engagement therewithbetween the sides of the plug and the arms, said washers havingupstanding fianges toengage the opposite edges of adjacent arms and aplurality of upstanding points to penetrate said arms. I

- W. IRVING BULLARD.

REFERENCES CITED The following references are of record in the fileotthis patent;

UNITEDVVSTATES PATENTS v 47,568 Sweden Feb. 1'7, 1919

